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Series GFM3/GFM4 Gas Mass Flow Meter
Brand: Dwyer Instruments, LLCThe Series GFM3 Gas Mass Flow Meter is an ideal choice for the measurement of flow rates of a wide variety of gases.
This digital flow meter features a 12-digit totalizer for total gas volume indication, and is available in the choice of 0 to 5 VDC, 0 to 10 VDC, or 4 to 20 mA output signals.
The Series GFM4 Gas Mass Flow Meter is an ideal choice for the measurement of flow rates of a wide variety of gases.
This multi parameter flow meter supports various functions such as flow totalizer, flow, temperature, and pressure alarms, and is available in a choice of 0 to 5VDC, 0 to 10VDC, or 4 to 20 mA output signals.
Standard LCD and four button keypad allows easy access to the many features of the GFM4. Digital interface operates through available RS-485 or RS-232, providing access to internal data parameters and multi-drop capability of up to 255 units (RS-485 only). Set alarms remotely via digital interface for flow, pressure, and temperature to alert user of high or low thresholds being exceeded. With a high ±1% FS accuracy and ±0.25% FS repeatability, the GFM4 is the optimal choice in gas flow metering and monitoring. The GFM4 comes with a NIST traceable certificate.
Features- Multi parameter flow meter supports various functions such as flow totalizer, flow, temperature, and pressure alarms, and is available in a choice of 0 to 5 Vdc, 0 to 10 Vdc, or 4 to 20 mA output signals
- Set alarms remotely via digital interface for flow, pressure, and temperature to alert user of high or low thresholds being exceeded
- Programmable 12-digit totalizer for total gas volume indication, and is available in the choice of 0 to 5 Vdc, 0 to 10 Vdc, or 4 to 20 mA output signals
- Standard four button keypad and large 128 x 64 graphical LCD with backlight allows easy access to the many features
- Digital interface operates through available RS-485 or RS-232, providing access to internal data parameters and multi-drop capability of up to 255 units (RS-485 only)
- Set alarms remotely via digital interface for flow to alert user of high or low thresholds being exceeded
- Internal conversion factors for up to 32 gases
- NIST traceable certificate included
- Automatic zero adjustment
- Self-diagnostic tests
Specifications
Accuracy
- ± 1 % of Full Scale
Ambient Temperature Range
- -10° to 50° C (14° to 122° F)
Display
- 128 x 64 Graphic LCD
Electrical Rating
- 1 A at 24 Vdc
Filter
- 5 microns
Load Impedance
- 3,000 ohms Min.
- 6,000 ohms Min.
Loop Resistance
- 500 ohms
Media
- Gas
NACE & NIST
- NIST
O-Ring Material
- Ethylene Propylene (EPR)
- PTFE
Output
- 0-10 Vdc
- 0-5 Vdc
- 4-20 mA
Power Requirement
- ± 24 Vdc
- 12 Vdc
- 15 Vdc
Repeatability
- ± 0.25 % of Full Scale
Response Time
- 0.6 to 1 second
Seat / Seal Material
- Buna-N
- Ethylene Propylene (EPR)
- Fluoroelastomer
- PTFE
Supply Voltage
- 110 Vac
- 15 Vdc Max.
- 24 Vdc
Temperature Range
- -10° to 50° C (14° to 122° F) - Dry Gases
Tube Connection
- 1/4” Compression Fitting
- 1/8” Compression Fitting
- 3/8” Compression Fitting
Wetted Materials
- 316 Stainless Steel
- 416 Stainless Steel
- Buna-N
- Fluoroelastomer
- Gas Flow Measurement
- Gas Flow Control
- Operating Pumps and Valves
- Process Equipment
- Vacuum Processes
- Glass and Metal Coating
- Film Deposition